Guitar Shop 101: The ABCs of Output Jacks | Premier GuitarMar 25, 2016There are many different types of output jacks, including mono, stereo, TRS, barrel, and power types (Photo 1). Ultimately they all have the same job: transfer the signal from your guitar to the instrument cable. Output jacks can eventually wear out, causing the signal to be intermittent—usuallyAuthor: John LevanHow to Wire a Guitar Jack | Our PastimesFuzziness, crackling, pops or cut-out of your guitar's sound, particularly when you know your cable is in good working order, is a good indication of loose or broken output jack wire. Fortunately, wiring a guitar jack is one of the easiest repair jobs you can perform.